/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

/* See https://github.com/libuv/libuv#documentation for documentation. */

#ifndef UV_H
#define UV_H
#ifdef __cplusplus
extern "C" {
#endif

#ifdef _WIN32
/* Windows - set up dll import/export decorators. */
#if defined(BUILDING_UV_SHARED)
/* Building shared library. */
#define UV_EXTERN __declspec(dllexport)
#elif defined(USING_UV_SHARED)
/* Using shared library. */
#define UV_EXTERN __declspec(dllimport)
#else
/* Building static library. */
#define UV_EXTERN /* nothing */
#endif
#elif __GNUC__ >= 4
#define UV_EXTERN __attribute__((visibility("default")))
#else
#define UV_EXTERN /* nothing */
#endif

#include "uv-errno.h"
#include "uv-version.h"
#include <stddef.h>
#include <stdio.h>

#if defined(_MSC_VER) && _MSC_VER < 1600
#include "stdint-msvc2008.h"
#else
#include <stdint.h>
#endif

#if defined(_WIN32)
#include "uv-win.h"
#else
#include "uv-unix.h"
#endif

/* Expand this list if necessary. */
#define UV_ERRNO_MAP(XX)                                           \
    XX(E2BIG, "argument list too long")                            \
    XX(EACCES, "permission denied")                                \
    XX(EADDRINUSE, "address already in use")                       \
    XX(EADDRNOTAVAIL, "address not available")                     \
    XX(EAFNOSUPPORT, "address family not supported")               \
    XX(EAGAIN, "resource temporarily unavailable")                 \
    XX(EAI_ADDRFAMILY, "address family not supported")             \
    XX(EAI_AGAIN, "temporary failure")                             \
    XX(EAI_BADFLAGS, "bad ai_flags value")                         \
    XX(EAI_BADHINTS, "invalid value for hints")                    \
    XX(EAI_CANCELED, "request canceled")                           \
    XX(EAI_FAIL, "permanent failure")                              \
    XX(EAI_FAMILY, "ai_family not supported")                      \
    XX(EAI_MEMORY, "out of memory")                                \
    XX(EAI_NODATA, "no address")                                   \
    XX(EAI_NONAME, "unknown node or service")                      \
    XX(EAI_OVERFLOW, "argument buffer overflow")                   \
    XX(EAI_PROTOCOL, "resolved protocol is unknown")               \
    XX(EAI_SERVICE, "service not available for socket type")       \
    XX(EAI_SOCKTYPE, "socket type not supported")                  \
    XX(EALREADY, "connection already in progress")                 \
    XX(EBADF, "bad file descriptor")                               \
    XX(EBUSY, "resource busy or locked")                           \
    XX(ECANCELED, "operation canceled")                            \
    XX(ECHARSET, "invalid Unicode character")                      \
    XX(ECONNABORTED, "software caused connection abort")           \
    XX(ECONNREFUSED, "connection refused")                         \
    XX(ECONNRESET, "connection reset by peer")                     \
    XX(EDESTADDRREQ, "destination address required")               \
    XX(EEXIST, "file already exists")                              \
    XX(EFAULT, "bad address in system call argument")              \
    XX(EFBIG, "file too large")                                    \
    XX(EHOSTUNREACH, "host is unreachable")                        \
    XX(EINTR, "interrupted system call")                           \
    XX(EINVAL, "invalid argument")                                 \
    XX(EIO, "i/o error")                                           \
    XX(EISCONN, "socket is already connected")                     \
    XX(EISDIR, "illegal operation on a directory")                 \
    XX(ELOOP, "too many symbolic links encountered")               \
    XX(EMFILE, "too many open files")                              \
    XX(EMSGSIZE, "message too long")                               \
    XX(ENAMETOOLONG, "name too long")                              \
    XX(ENETDOWN, "network is down")                                \
    XX(ENETUNREACH, "network is unreachable")                      \
    XX(ENFILE, "file table overflow")                              \
    XX(ENOBUFS, "no buffer space available")                       \
    XX(ENODEV, "no such device")                                   \
    XX(ENOENT, "no such file or directory!")                       \
    XX(ENOMEM, "not enough memory")                                \
    XX(ENONET, "machine is not on the network")                    \
    XX(ENOPROTOOPT, "protocol not available")                      \
    XX(ENOSPC, "no space left on device")                          \
    XX(ENOSYS, "function not implemented")                         \
    XX(ENOTCONN, "socket is not connected")                        \
    XX(ENOTDIR, "not a directory")                                 \
    XX(ENOTEMPTY, "directory not empty")                           \
    XX(ENOTSOCK, "socket operation on non-socket")                 \
    XX(ENOTSUP, "operation not supported on socket")               \
    XX(EPERM, "operation not permitted")                           \
    XX(EPIPE, "broken pipe")                                       \
    XX(EPROTO, "protocol error")                                   \
    XX(EPROTONOSUPPORT, "protocol not supported")                  \
    XX(EPROTOTYPE, "protocol wrong type for socket")               \
    XX(ERANGE, "result too large")                                 \
    XX(EROFS, "read-only file system")                             \
    XX(ESHUTDOWN, "cannot send after transport endpoint shutdown") \
    XX(ESPIPE, "invalid seek")                                     \
    XX(ESRCH, "no such process")                                   \
    XX(ETIMEDOUT, "connection timed out")                          \
    XX(ETXTBSY, "text file is busy")                               \
    XX(EXDEV, "cross-device link not permitted")                   \
    XX(UNKNOWN, "unknown error")                                   \
    XX(EOF, "end of file")                                         \
    XX(ENXIO, "no such device or address")                         \
    XX(EMLINK, "too many links")                                   \
    XX(EHOSTDOWN, "host is down")

#define UV_HANDLE_TYPE_MAP(XX) \
    XX(ASYNC, async)           \
    XX(CHECK, check)           \
    XX(FS_EVENT, fs_event)     \
    XX(FS_POLL, fs_poll)       \
    XX(HANDLE, handle)         \
    XX(IDLE, idle)             \
    XX(NAMED_PIPE, pipe)       \
    XX(POLL, poll)             \
    XX(PREPARE, prepare)       \
    XX(PROCESS, process)       \
    XX(STREAM, stream)         \
    XX(TCP, tcp)               \
    XX(TIMER, timer)           \
    XX(TTY, tty)               \
    XX(UDP, udp)               \
    XX(SIGNAL, signal)

#define UV_REQ_TYPE_MAP(XX)      \
    XX(REQ, req)                 \
    XX(CONNECT, connect)         \
    XX(WRITE, write)             \
    XX(SHUTDOWN, shutdown)       \
    XX(UDP_SEND, udp_send)       \
    XX(FS, fs)                   \
    XX(WORK, work)               \
    XX(GETADDRINFO, getaddrinfo) \
    XX(GETNAMEINFO, getnameinfo)

typedef enum {
#define XX(code, _) UV_##code = UV__##code,
    UV_ERRNO_MAP(XX)
#undef XX
        UV_ERRNO_MAX
    = UV__EOF - 1
} uv_errno_t;

typedef enum {
    UV_UNKNOWN_HANDLE = 0,
#define XX(uc, lc) UV_##uc,
    UV_HANDLE_TYPE_MAP(XX)
#undef XX
        UV_FILE,
    UV_HANDLE_TYPE_MAX
} uv_handle_type;

typedef enum {
    UV_UNKNOWN_REQ = 0,
#define XX(uc, lc) UV_##uc,
    UV_REQ_TYPE_MAP(XX)
#undef XX
        UV_REQ_TYPE_PRIVATE
            UV_REQ_TYPE_MAX
} uv_req_type;

/* Handle types. */
typedef struct uv_loop_s uv_loop_t;
typedef struct uv_handle_s uv_handle_t;
typedef struct uv_stream_s uv_stream_t;
typedef struct uv_tcp_s uv_tcp_t;
typedef struct uv_udp_s uv_udp_t;
typedef struct uv_pipe_s uv_pipe_t;
typedef struct uv_tty_s uv_tty_t;
typedef struct uv_poll_s uv_poll_t;
typedef struct uv_timer_s uv_timer_t;
typedef struct uv_prepare_s uv_prepare_t;
typedef struct uv_check_s uv_check_t;
typedef struct uv_idle_s uv_idle_t;
typedef struct uv_async_s uv_async_t;
typedef struct uv_process_s uv_process_t;
typedef struct uv_fs_event_s uv_fs_event_t;
typedef struct uv_fs_poll_s uv_fs_poll_t;
typedef struct uv_signal_s uv_signal_t;

/* Request types. */
typedef struct uv_req_s uv_req_t;
typedef struct uv_getaddrinfo_s uv_getaddrinfo_t;
typedef struct uv_getnameinfo_s uv_getnameinfo_t;
typedef struct uv_shutdown_s uv_shutdown_t;
typedef struct uv_write_s uv_write_t;
typedef struct uv_connect_s uv_connect_t;
typedef struct uv_udp_send_s uv_udp_send_t;
typedef struct uv_fs_s uv_fs_t;
typedef struct uv_work_s uv_work_t;

/* None of the above. */
typedef struct uv_cpu_info_s uv_cpu_info_t;
typedef struct uv_interface_address_s uv_interface_address_t;
typedef struct uv_dirent_s uv_dirent_t;
typedef struct uv_passwd_s uv_passwd_t;

typedef enum {
    UV_LOOP_BLOCK_SIGNAL
} uv_loop_option;

typedef enum {
    UV_RUN_DEFAULT = 0,
    UV_RUN_ONCE,
    UV_RUN_NOWAIT
} uv_run_mode;

UV_EXTERN unsigned int uv_version(void);
UV_EXTERN const char* uv_version_string(void);

typedef void* (*uv_malloc_func)(size_t size);
typedef void* (*uv_realloc_func)(void* ptr, size_t size);
typedef void* (*uv_calloc_func)(size_t count, size_t size);
typedef void (*uv_free_func)(void* ptr);

UV_EXTERN int uv_replace_allocator(uv_malloc_func malloc_func,
    uv_realloc_func realloc_func,
    uv_calloc_func calloc_func,
    uv_free_func free_func);

UV_EXTERN uv_loop_t* uv_default_loop(void);
UV_EXTERN int uv_loop_init(uv_loop_t* loop);
UV_EXTERN int uv_loop_close(uv_loop_t* loop);
/*
 * NOTE:
 *  This function is DEPRECATED (to be removed after 0.12), users should
 *  allocate the loop manually and use uv_loop_init instead.
 */
UV_EXTERN uv_loop_t* uv_loop_new(void);
/*
 * NOTE:
 *  This function is DEPRECATED (to be removed after 0.12). Users should use
 *  uv_loop_close and free the memory manually instead.
 */
UV_EXTERN void uv_loop_delete(uv_loop_t*);
UV_EXTERN size_t uv_loop_size(void);
UV_EXTERN int uv_loop_alive(const uv_loop_t* loop);
UV_EXTERN int uv_loop_configure(uv_loop_t* loop, uv_loop_option option, ...);

UV_EXTERN int uv_run(uv_loop_t*, uv_run_mode mode);
UV_EXTERN void uv_stop(uv_loop_t*);

UV_EXTERN void uv_ref(uv_handle_t*);
UV_EXTERN void uv_unref(uv_handle_t*);
UV_EXTERN int uv_has_ref(const uv_handle_t*);

UV_EXTERN void uv_update_time(uv_loop_t*);
UV_EXTERN uint64_t uv_now(const uv_loop_t*);

UV_EXTERN int uv_backend_fd(const uv_loop_t*);
UV_EXTERN int uv_backend_timeout(const uv_loop_t*);

typedef void (*uv_alloc_cb)(uv_handle_t* handle,
    size_t suggested_size,
    uv_buf_t* buf);
typedef void (*uv_read_cb)(uv_stream_t* stream,
    ssize_t nread,
    const uv_buf_t* buf);
typedef void (*uv_write_cb)(uv_write_t* req, int status);
typedef void (*uv_connect_cb)(uv_connect_t* req, int status);
typedef void (*uv_shutdown_cb)(uv_shutdown_t* req, int status);
typedef void (*uv_connection_cb)(uv_stream_t* server, int status);
typedef void (*uv_close_cb)(uv_handle_t* handle);
typedef void (*uv_poll_cb)(uv_poll_t* handle, int status, int events);
typedef void (*uv_timer_cb)(uv_timer_t* handle);
typedef void (*uv_async_cb)(uv_async_t* handle);
typedef void (*uv_prepare_cb)(uv_prepare_t* handle);
typedef void (*uv_check_cb)(uv_check_t* handle);
typedef void (*uv_idle_cb)(uv_idle_t* handle);
typedef void (*uv_exit_cb)(uv_process_t*, int64_t exit_status, int term_signal);
typedef void (*uv_walk_cb)(uv_handle_t* handle, void* arg);
typedef void (*uv_fs_cb)(uv_fs_t* req);
typedef void (*uv_work_cb)(uv_work_t* req);
typedef void (*uv_after_work_cb)(uv_work_t* req, int status);
typedef void (*uv_getaddrinfo_cb)(uv_getaddrinfo_t* req,
    int status,
    struct addrinfo* res);
typedef void (*uv_getnameinfo_cb)(uv_getnameinfo_t* req,
    int status,
    const char* hostname,
    const char* service);

typedef struct {
    long tv_sec;
    long tv_nsec;
} uv_timespec_t;

typedef struct {
    uint64_t st_dev;
    uint64_t st_mode;
    uint64_t st_nlink;
    uint64_t st_uid;
    uint64_t st_gid;
    uint64_t st_rdev;
    uint64_t st_ino;
    uint64_t st_size;
    uint64_t st_blksize;
    uint64_t st_blocks;
    uint64_t st_flags;
    uint64_t st_gen;
    uv_timespec_t st_atim;
    uv_timespec_t st_mtim;
    uv_timespec_t st_ctim;
    uv_timespec_t st_birthtim;
} uv_stat_t;

typedef void (*uv_fs_event_cb)(uv_fs_event_t* handle,
    const char* filename,
    int events,
    int status);

typedef void (*uv_fs_poll_cb)(uv_fs_poll_t* handle,
    int status,
    const uv_stat_t* prev,
    const uv_stat_t* curr);

typedef void (*uv_signal_cb)(uv_signal_t* handle, int signum);

typedef enum {
    UV_LEAVE_GROUP = 0,
    UV_JOIN_GROUP
} uv_membership;

UV_EXTERN const char* uv_strerror(int err);
UV_EXTERN const char* uv_err_name(int err);

#define UV_REQ_FIELDS      \
    /* public */           \
    void* data;            \
    /* read-only */        \
    uv_req_type type;      \
    /* private */          \
    void* active_queue[2]; \
    void* reserved[4];     \
    UV_REQ_PRIVATE_FIELDS

/* Abstract base class of all requests. */
struct uv_req_s {
    UV_REQ_FIELDS
};

/* Platform-specific request types. */
UV_PRIVATE_REQ_TYPES

UV_EXTERN int uv_shutdown(uv_shutdown_t* req,
    uv_stream_t* handle,
    uv_shutdown_cb cb);

struct uv_shutdown_s {
    UV_REQ_FIELDS
    uv_stream_t* handle;
    uv_shutdown_cb cb;
    UV_SHUTDOWN_PRIVATE_FIELDS
};

#define UV_HANDLE_FIELDS   \
    /* public */           \
    void* data;            \
    /* read-only */        \
    uv_loop_t* loop;       \
    uv_handle_type type;   \
    /* private */          \
    uv_close_cb close_cb;  \
    void* handle_queue[2]; \
    union {                \
        int fd;            \
        void* reserved[4]; \
    } u;                   \
    UV_HANDLE_PRIVATE_FIELDS

/* The abstract base class of all handles. */
struct uv_handle_s {
    UV_HANDLE_FIELDS
};

UV_EXTERN size_t uv_handle_size(uv_handle_type type);
UV_EXTERN size_t uv_req_size(uv_req_type type);

UV_EXTERN int uv_is_active(const uv_handle_t* handle);

UV_EXTERN void uv_walk(uv_loop_t* loop, uv_walk_cb walk_cb, void* arg);

/* Helpers for ad hoc debugging, no API/ABI stability guaranteed. */
UV_EXTERN void uv_print_all_handles(uv_loop_t* loop, FILE* stream);
UV_EXTERN void uv_print_active_handles(uv_loop_t* loop, FILE* stream);

UV_EXTERN void uv_close(uv_handle_t* handle, uv_close_cb close_cb);

UV_EXTERN int uv_send_buffer_size(uv_handle_t* handle, int* value);
UV_EXTERN int uv_recv_buffer_size(uv_handle_t* handle, int* value);

UV_EXTERN int uv_fileno(const uv_handle_t* handle, uv_os_fd_t* fd);

UV_EXTERN uv_buf_t uv_buf_init(char* base, unsigned int len);

#define UV_STREAM_FIELDS                     \
    /* number of bytes queued for writing */ \
    size_t write_queue_size;                 \
    uv_alloc_cb alloc_cb;                    \
    uv_read_cb read_cb;                      \
    /* private */                            \
    UV_STREAM_PRIVATE_FIELDS

/*
 * uv_stream_t is a subclass of uv_handle_t.
 *
 * uv_stream is an abstract class.
 *
 * uv_stream_t is the parent class of uv_tcp_t, uv_pipe_t and uv_tty_t.
 */
struct uv_stream_s {
    UV_HANDLE_FIELDS
    UV_STREAM_FIELDS
};

UV_EXTERN int uv_listen(uv_stream_t* stream, int backlog, uv_connection_cb cb);
UV_EXTERN int uv_accept(uv_stream_t* server, uv_stream_t* client);

UV_EXTERN int uv_read_start(uv_stream_t*,
    uv_alloc_cb alloc_cb,
    uv_read_cb read_cb);
UV_EXTERN int uv_read_stop(uv_stream_t*);

UV_EXTERN int uv_write(uv_write_t* req,
    uv_stream_t* handle,
    const uv_buf_t bufs[],
    unsigned int nbufs,
    uv_write_cb cb);
UV_EXTERN int uv_write2(uv_write_t* req,
    uv_stream_t* handle,
    const uv_buf_t bufs[],
    unsigned int nbufs,
    uv_stream_t* send_handle,
    uv_write_cb cb);
UV_EXTERN int uv_try_write(uv_stream_t* handle,
    const uv_buf_t bufs[],
    unsigned int nbufs);

/* uv_write_t is a subclass of uv_req_t. */
struct uv_write_s {
    UV_REQ_FIELDS
    uv_write_cb cb;
    uv_stream_t* send_handle;
    uv_stream_t* handle;
    UV_WRITE_PRIVATE_FIELDS
};

UV_EXTERN int uv_is_readable(const uv_stream_t* handle);
UV_EXTERN int uv_is_writable(const uv_stream_t* handle);

UV_EXTERN int uv_stream_set_blocking(uv_stream_t* handle, int blocking);

UV_EXTERN int uv_is_closing(const uv_handle_t* handle);

/*
 * uv_tcp_t is a subclass of uv_stream_t.
 *
 * Represents a TCP stream or TCP server.
 */
struct uv_tcp_s {
    UV_HANDLE_FIELDS
    UV_STREAM_FIELDS
    UV_TCP_PRIVATE_FIELDS
};

UV_EXTERN int uv_tcp_init(uv_loop_t*, uv_tcp_t* handle);
UV_EXTERN int uv_tcp_init_ex(uv_loop_t*, uv_tcp_t* handle, unsigned int flags);
UV_EXTERN int uv_tcp_open(uv_tcp_t* handle, uv_os_sock_t sock);
UV_EXTERN int uv_tcp_nodelay(uv_tcp_t* handle, int enable);
UV_EXTERN int uv_tcp_keepalive(uv_tcp_t* handle,
    int enable,
    unsigned int delay);
UV_EXTERN int uv_tcp_simultaneous_accepts(uv_tcp_t* handle, int enable);

enum uv_tcp_flags {
    /* Used with uv_tcp_bind, when an IPv6 address is used. */
    UV_TCP_IPV6ONLY = 1
};

UV_EXTERN int uv_tcp_bind(uv_tcp_t* handle,
    const struct sockaddr* addr,
    unsigned int flags);
UV_EXTERN int uv_tcp_getsockname(const uv_tcp_t* handle,
    struct sockaddr* name,
    int* namelen);
UV_EXTERN int uv_tcp_getpeername(const uv_tcp_t* handle,
    struct sockaddr* name,
    int* namelen);
UV_EXTERN int uv_tcp_connect(uv_connect_t* req,
    uv_tcp_t* handle,
    const struct sockaddr* addr,
    uv_connect_cb cb);

/* uv_connect_t is a subclass of uv_req_t. */
struct uv_connect_s {
    UV_REQ_FIELDS
    uv_connect_cb cb;
    uv_stream_t* handle;
    UV_CONNECT_PRIVATE_FIELDS
};

/*
 * UDP support.
 */

enum uv_udp_flags {
    /* Disables dual stack mode. */
    UV_UDP_IPV6ONLY = 1,
    /*
   * Indicates message was truncated because read buffer was too small. The
   * remainder was discarded by the OS. Used in uv_udp_recv_cb.
   */
    UV_UDP_PARTIAL = 2,
    /*
   * Indicates if SO_REUSEADDR will be set when binding the handle.
   * This sets the SO_REUSEPORT socket flag on the BSDs and OS X. On other
   * Unix platforms, it sets the SO_REUSEADDR flag.  What that means is that
   * multiple threads or processes can bind to the same address without error
   * (provided they all set the flag) but only the last one to bind will receive
   * any traffic, in effect "stealing" the port from the previous listener.
   */
    UV_UDP_REUSEADDR = 4
};

typedef void (*uv_udp_send_cb)(uv_udp_send_t* req, int status);
typedef void (*uv_udp_recv_cb)(uv_udp_t* handle,
    ssize_t nread,
    const uv_buf_t* buf,
    const struct sockaddr* addr,
    unsigned flags);

/* uv_udp_t is a subclass of uv_handle_t. */
struct uv_udp_s {
    UV_HANDLE_FIELDS
    /* read-only */
    /*
   * Number of bytes queued for sending. This field strictly shows how much
   * information is currently queued.
   */
    size_t send_queue_size;
    /*
   * Number of send requests currently in the queue awaiting to be processed.
   */
    size_t send_queue_count;
    UV_UDP_PRIVATE_FIELDS
};

/* uv_udp_send_t is a subclass of uv_req_t. */
struct uv_udp_send_s {
    UV_REQ_FIELDS
    uv_udp_t* handle;
    uv_udp_send_cb cb;
    UV_UDP_SEND_PRIVATE_FIELDS
};

UV_EXTERN int uv_udp_init(uv_loop_t*, uv_udp_t* handle);
UV_EXTERN int uv_udp_init_ex(uv_loop_t*, uv_udp_t* handle, unsigned int flags);
UV_EXTERN int uv_udp_open(uv_udp_t* handle, uv_os_sock_t sock);
UV_EXTERN int uv_udp_bind(uv_udp_t* handle,
    const struct sockaddr* addr,
    unsigned int flags);

UV_EXTERN int uv_udp_getsockname(const uv_udp_t* handle,
    struct sockaddr* name,
    int* namelen);
UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle,
    const char* multicast_addr,
    const char* interface_addr,
    uv_membership membership);
UV_EXTERN int uv_udp_set_multicast_loop(uv_udp_t* handle, int on);
UV_EXTERN int uv_udp_set_multicast_ttl(uv_udp_t* handle, int ttl);
UV_EXTERN int uv_udp_set_multicast_interface(uv_udp_t* handle,
    const char* interface_addr);
UV_EXTERN int uv_udp_set_broadcast(uv_udp_t* handle, int on);
UV_EXTERN int uv_udp_set_ttl(uv_udp_t* handle, int ttl);
UV_EXTERN int uv_udp_send(uv_udp_send_t* req,
    uv_udp_t* handle,
    const uv_buf_t bufs[],
    unsigned int nbufs,
    const struct sockaddr* addr,
    uv_udp_send_cb send_cb);
UV_EXTERN int uv_udp_try_send(uv_udp_t* handle,
    const uv_buf_t bufs[],
    unsigned int nbufs,
    const struct sockaddr* addr);
UV_EXTERN int uv_udp_recv_start(uv_udp_t* handle,
    uv_alloc_cb alloc_cb,
    uv_udp_recv_cb recv_cb);
UV_EXTERN int uv_udp_recv_stop(uv_udp_t* handle);

/*
 * uv_tty_t is a subclass of uv_stream_t.
 *
 * Representing a stream for the console.
 */
struct uv_tty_s {
    UV_HANDLE_FIELDS
    UV_STREAM_FIELDS
    UV_TTY_PRIVATE_FIELDS
};

typedef enum {
    /* Initial/normal terminal mode */
    UV_TTY_MODE_NORMAL,
    /* Raw input mode (On Windows, ENABLE_WINDOW_INPUT is also enabled) */
    UV_TTY_MODE_RAW,
    /* Binary-safe I/O mode for IPC (Unix-only) */
    UV_TTY_MODE_IO
} uv_tty_mode_t;

UV_EXTERN int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_file fd, int readable);
UV_EXTERN int uv_tty_set_mode(uv_tty_t*, uv_tty_mode_t mode);
UV_EXTERN int uv_tty_reset_mode(void);
UV_EXTERN int uv_tty_get_winsize(uv_tty_t*, int* width, int* height);

#ifdef __cplusplus
extern "C++" {

inline int uv_tty_set_mode(uv_tty_t* handle, int mode)
{
    return uv_tty_set_mode(handle, static_cast<uv_tty_mode_t>(mode));
}
}
#endif

UV_EXTERN uv_handle_type uv_guess_handle(uv_file file);

/*
 * uv_pipe_t is a subclass of uv_stream_t.
 *
 * Representing a pipe stream or pipe server. On Windows this is a Named
 * Pipe. On Unix this is a Unix domain socket.
 */
struct uv_pipe_s {
    UV_HANDLE_FIELDS
    UV_STREAM_FIELDS
    int ipc; /* non-zero if this pipe is used for passing handles */
    UV_PIPE_PRIVATE_FIELDS
};

UV_EXTERN int uv_pipe_init(uv_loop_t*, uv_pipe_t* handle, int ipc);
UV_EXTERN int uv_pipe_open(uv_pipe_t*, uv_file file);
UV_EXTERN int uv_pipe_bind(uv_pipe_t* handle, const char* name);
UV_EXTERN void uv_pipe_connect(uv_connect_t* req,
    uv_pipe_t* handle,
    const char* name,
    uv_connect_cb cb);
UV_EXTERN int uv_pipe_getsockname(const uv_pipe_t* handle,
    char* buffer,
    size_t* size);
UV_EXTERN int uv_pipe_getpeername(const uv_pipe_t* handle,
    char* buffer,
    size_t* size);
UV_EXTERN void uv_pipe_pending_instances(uv_pipe_t* handle, int count);
UV_EXTERN int uv_pipe_pending_count(uv_pipe_t* handle);
UV_EXTERN uv_handle_type uv_pipe_pending_type(uv_pipe_t* handle);

struct uv_poll_s {
    UV_HANDLE_FIELDS
    uv_poll_cb poll_cb;
    UV_POLL_PRIVATE_FIELDS
};

enum uv_poll_event {
    UV_READABLE = 1,
    UV_WRITABLE = 2,
    UV_DISCONNECT = 4
};

UV_EXTERN int uv_poll_init(uv_loop_t* loop, uv_poll_t* handle, int fd);
UV_EXTERN int uv_poll_init_socket(uv_loop_t* loop,
    uv_poll_t* handle,
    uv_os_sock_t socket);
UV_EXTERN int uv_poll_start(uv_poll_t* handle, int events, uv_poll_cb cb);
UV_EXTERN int uv_poll_stop(uv_poll_t* handle);

struct uv_prepare_s {
    UV_HANDLE_FIELDS
    UV_PREPARE_PRIVATE_FIELDS
};

UV_EXTERN int uv_prepare_init(uv_loop_t*, uv_prepare_t* prepare);
UV_EXTERN int uv_prepare_start(uv_prepare_t* prepare, uv_prepare_cb cb);
UV_EXTERN int uv_prepare_stop(uv_prepare_t* prepare);

struct uv_check_s {
    UV_HANDLE_FIELDS
    UV_CHECK_PRIVATE_FIELDS
};

UV_EXTERN int uv_check_init(uv_loop_t*, uv_check_t* check);
UV_EXTERN int uv_check_start(uv_check_t* check, uv_check_cb cb);
UV_EXTERN int uv_check_stop(uv_check_t* check);

struct uv_idle_s {
    UV_HANDLE_FIELDS
    UV_IDLE_PRIVATE_FIELDS
};

UV_EXTERN int uv_idle_init(uv_loop_t*, uv_idle_t* idle);
UV_EXTERN int uv_idle_start(uv_idle_t* idle, uv_idle_cb cb);
UV_EXTERN int uv_idle_stop(uv_idle_t* idle);

struct uv_async_s {
    UV_HANDLE_FIELDS
    UV_ASYNC_PRIVATE_FIELDS
};

UV_EXTERN int uv_async_init(uv_loop_t*,
    uv_async_t* async,
    uv_async_cb async_cb);
UV_EXTERN int uv_async_send(uv_async_t* async);

/*
 * uv_timer_t is a subclass of uv_handle_t.
 *
 * Used to get woken up at a specified time in the future.
 */
struct uv_timer_s {
    UV_HANDLE_FIELDS
    UV_TIMER_PRIVATE_FIELDS
};

UV_EXTERN int uv_timer_init(uv_loop_t*, uv_timer_t* handle);
UV_EXTERN int uv_timer_start(uv_timer_t* handle,
    uv_timer_cb cb,
    uint64_t timeout,
    uint64_t repeat);
UV_EXTERN int uv_timer_stop(uv_timer_t* handle);
UV_EXTERN int uv_timer_again(uv_timer_t* handle);
UV_EXTERN void uv_timer_set_repeat(uv_timer_t* handle, uint64_t repeat);
UV_EXTERN uint64_t uv_timer_get_repeat(const uv_timer_t* handle);

/*
 * uv_getaddrinfo_t is a subclass of uv_req_t.
 *
 * Request object for uv_getaddrinfo.
 */
struct uv_getaddrinfo_s {
    UV_REQ_FIELDS
    /* read-only */
    uv_loop_t* loop;
    /* struct addrinfo* addrinfo is marked as private, but it really isn't. */
    UV_GETADDRINFO_PRIVATE_FIELDS
};

UV_EXTERN int uv_getaddrinfo(uv_loop_t* loop,
    uv_getaddrinfo_t* req,
    uv_getaddrinfo_cb getaddrinfo_cb,
    const char* node,
    const char* service,
    const struct addrinfo* hints);
UV_EXTERN void uv_freeaddrinfo(struct addrinfo* ai);

/*
* uv_getnameinfo_t is a subclass of uv_req_t.
*
* Request object for uv_getnameinfo.
*/
struct uv_getnameinfo_s {
    UV_REQ_FIELDS
    /* read-only */
    uv_loop_t* loop;
    /* host and service are marked as private, but they really aren't. */
    UV_GETNAMEINFO_PRIVATE_FIELDS
};

UV_EXTERN int uv_getnameinfo(uv_loop_t* loop,
    uv_getnameinfo_t* req,
    uv_getnameinfo_cb getnameinfo_cb,
    const struct sockaddr* addr,
    int flags);

/* uv_spawn() options. */
typedef enum {
    UV_IGNORE = 0x00,
    UV_CREATE_PIPE = 0x01,
    UV_INHERIT_FD = 0x02,
    UV_INHERIT_STREAM = 0x04,

    /*
   * When UV_CREATE_PIPE is specified, UV_READABLE_PIPE and UV_WRITABLE_PIPE
   * determine the direction of flow, from the child process' perspective. Both
   * flags may be specified to create a duplex data stream.
   */
    UV_READABLE_PIPE = 0x10,
    UV_WRITABLE_PIPE = 0x20
} uv_stdio_flags;

typedef struct uv_stdio_container_s {
    uv_stdio_flags flags;

    union {
        uv_stream_t* stream;
        int fd;
    } data;
} uv_stdio_container_t;

typedef struct uv_process_options_s {
    uv_exit_cb exit_cb; /* Called after the process exits. */
    const char* file; /* Path to program to execute. */
    /*
   * Command line arguments. args[0] should be the path to the program. On
   * Windows this uses CreateProcess which concatenates the arguments into a
   * string this can cause some strange errors. See the note at
   * windows_verbatim_arguments.
   */
    char** args;
    /*
   * This will be set as the environ variable in the subprocess. If this is
   * NULL then the parents environ will be used.
   */
    char** env;
    /*
   * If non-null this represents a directory the subprocess should execute
   * in. Stands for current working directory.
   */
    const char* cwd;
    /*
   * Various flags that control how uv_spawn() behaves. See the definition of
   * `enum uv_process_flags` below.
   */
    unsigned int flags;
    /*
   * The `stdio` field points to an array of uv_stdio_container_t structs that
   * describe the file descriptors that will be made available to the child
   * process. The convention is that stdio[0] points to stdin, fd 1 is used for
   * stdout, and fd 2 is stderr.
   *
   * Note that on windows file descriptors greater than 2 are available to the
   * child process only if the child processes uses the MSVCRT runtime.
   */
    int stdio_count;
    uv_stdio_container_t* stdio;
    /*
   * Libuv can change the child process' user/group id. This happens only when
   * the appropriate bits are set in the flags fields. This is not supported on
   * windows; uv_spawn() will fail and set the error to UV_ENOTSUP.
   */
    uv_uid_t uid;
    uv_gid_t gid;
} uv_process_options_t;

/*
 * These are the flags that can be used for the uv_process_options.flags field.
 */
enum uv_process_flags {
    /*
   * Set the child process' user id. The user id is supplied in the `uid` field
   * of the options struct. This does not work on windows; setting this flag
   * will cause uv_spawn() to fail.
   */
    UV_PROCESS_SETUID = (1 << 0),
    /*
   * Set the child process' group id. The user id is supplied in the `gid`
   * field of the options struct. This does not work on windows; setting this
   * flag will cause uv_spawn() to fail.
   */
    UV_PROCESS_SETGID = (1 << 1),
    /*
   * Do not wrap any arguments in quotes, or perform any other escaping, when
   * converting the argument list into a command line string. This option is
   * only meaningful on Windows systems. On Unix it is silently ignored.
   */
    UV_PROCESS_WINDOWS_VERBATIM_ARGUMENTS = (1 << 2),
    /*
   * Spawn the child process in a detached state - this will make it a process
   * group leader, and will effectively enable the child to keep running after
   * the parent exits.  Note that the child process will still keep the
   * parent's event loop alive unless the parent process calls uv_unref() on
   * the child's process handle.
   */
    UV_PROCESS_DETACHED = (1 << 3),
    /*
   * Hide the subprocess console window that would normally be created. This
   * option is only meaningful on Windows systems. On Unix it is silently
   * ignored.
   */
    UV_PROCESS_WINDOWS_HIDE = (1 << 4)
};

/*
 * uv_process_t is a subclass of uv_handle_t.
 */
struct uv_process_s {
    UV_HANDLE_FIELDS
    uv_exit_cb exit_cb;
    int pid;
    UV_PROCESS_PRIVATE_FIELDS
};

UV_EXTERN int uv_spawn(uv_loop_t* loop,
    uv_process_t* handle,
    const uv_process_options_t* options);
UV_EXTERN int uv_process_kill(uv_process_t*, int signum);
UV_EXTERN int uv_kill(int pid, int signum);

/*
 * uv_work_t is a subclass of uv_req_t.
 */
struct uv_work_s {
    UV_REQ_FIELDS
    uv_loop_t* loop;
    uv_work_cb work_cb;
    uv_after_work_cb after_work_cb;
    UV_WORK_PRIVATE_FIELDS
};

UV_EXTERN int uv_queue_work(uv_loop_t* loop,
    uv_work_t* req,
    uv_work_cb work_cb,
    uv_after_work_cb after_work_cb);

UV_EXTERN int uv_cancel(uv_req_t* req);

struct uv_cpu_info_s {
    char* model;
    int speed;
    struct uv_cpu_times_s {
        uint64_t user;
        uint64_t nice;
        uint64_t sys;
        uint64_t idle;
        uint64_t irq;
    } cpu_times;
};

struct uv_interface_address_s {
    char* name;
    char phys_addr[6];
    int is_internal;
    union {
        struct sockaddr_in address4;
        struct sockaddr_in6 address6;
    } address;
    union {
        struct sockaddr_in netmask4;
        struct sockaddr_in6 netmask6;
    } netmask;
};

struct uv_passwd_s {
    char* username;
    long uid;
    long gid;
    char* shell;
    char* homedir;
};

typedef enum {
    UV_DIRENT_UNKNOWN,
    UV_DIRENT_FILE,
    UV_DIRENT_DIR,
    UV_DIRENT_LINK,
    UV_DIRENT_FIFO,
    UV_DIRENT_SOCKET,
    UV_DIRENT_CHAR,
    UV_DIRENT_BLOCK
} uv_dirent_type_t;

struct uv_dirent_s {
    const char* name;
    uv_dirent_type_t type;
};

UV_EXTERN char** uv_setup_args(int argc, char** argv);
UV_EXTERN int uv_get_process_title(char* buffer, size_t size);
UV_EXTERN int uv_set_process_title(const char* title);
UV_EXTERN int uv_resident_set_memory(size_t* rss);
UV_EXTERN int uv_uptime(double* uptime);

typedef struct {
    long tv_sec;
    long tv_usec;
} uv_timeval_t;

typedef struct {
    uv_timeval_t ru_utime; /* user CPU time used */
    uv_timeval_t ru_stime; /* system CPU time used */
    uint64_t ru_maxrss; /* maximum resident set size */
    uint64_t ru_ixrss; /* integral shared memory size */
    uint64_t ru_idrss; /* integral unshared data size */
    uint64_t ru_isrss; /* integral unshared stack size */
    uint64_t ru_minflt; /* page reclaims (soft page faults) */
    uint64_t ru_majflt; /* page faults (hard page faults) */
    uint64_t ru_nswap; /* swaps */
    uint64_t ru_inblock; /* block input operations */
    uint64_t ru_oublock; /* block output operations */
    uint64_t ru_msgsnd; /* IPC messages sent */
    uint64_t ru_msgrcv; /* IPC messages received */
    uint64_t ru_nsignals; /* signals received */
    uint64_t ru_nvcsw; /* voluntary context switches */
    uint64_t ru_nivcsw; /* involuntary context switches */
} uv_rusage_t;

UV_EXTERN int uv_getrusage(uv_rusage_t* rusage);

UV_EXTERN int uv_os_homedir(char* buffer, size_t* size);
UV_EXTERN int uv_os_tmpdir(char* buffer, size_t* size);
UV_EXTERN int uv_os_get_passwd(uv_passwd_t* pwd);
UV_EXTERN void uv_os_free_passwd(uv_passwd_t* pwd);

UV_EXTERN int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count);
UV_EXTERN void uv_free_cpu_info(uv_cpu_info_t* cpu_infos, int count);

UV_EXTERN int uv_interface_addresses(uv_interface_address_t** addresses,
    int* count);
UV_EXTERN void uv_free_interface_addresses(uv_interface_address_t* addresses,
    int count);

typedef enum {
    UV_FS_UNKNOWN = -1,
    UV_FS_CUSTOM,
    UV_FS_OPEN,
    UV_FS_CLOSE,
    UV_FS_READ,
    UV_FS_WRITE,
    UV_FS_SENDFILE,
    UV_FS_STAT,
    UV_FS_LSTAT,
    UV_FS_FSTAT,
    UV_FS_FTRUNCATE,
    UV_FS_UTIME,
    UV_FS_FUTIME,
    UV_FS_ACCESS,
    UV_FS_CHMOD,
    UV_FS_FCHMOD,
    UV_FS_FSYNC,
    UV_FS_FDATASYNC,
    UV_FS_UNLINK,
    UV_FS_RMDIR,
    UV_FS_MKDIR,
    UV_FS_MKDTEMP,
    UV_FS_RENAME,
    UV_FS_SCANDIR,
    UV_FS_LINK,
    UV_FS_SYMLINK,
    UV_FS_READLINK,
    UV_FS_CHOWN,
    UV_FS_FCHOWN,
    UV_FS_REALPATH
} uv_fs_type;

/* uv_fs_t is a subclass of uv_req_t. */
struct uv_fs_s {
    UV_REQ_FIELDS
    uv_fs_type fs_type;
    uv_loop_t* loop;
    uv_fs_cb cb;
    ssize_t result;
    void* ptr;
    const char* path;
    uv_stat_t statbuf; /* Stores the result of uv_fs_stat() and uv_fs_fstat(). */
    UV_FS_PRIVATE_FIELDS
};

UV_EXTERN void uv_fs_req_cleanup(uv_fs_t* req);
UV_EXTERN int uv_fs_close(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_open(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    int flags,
    int mode,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_read(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    const uv_buf_t bufs[],
    unsigned int nbufs,
    int64_t offset,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_unlink(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_write(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    const uv_buf_t bufs[],
    unsigned int nbufs,
    int64_t offset,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_mkdir(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    int mode,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_mkdtemp(uv_loop_t* loop,
    uv_fs_t* req,
    const char* tpl,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_rmdir(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_scandir(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    int flags,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_scandir_next(uv_fs_t* req,
    uv_dirent_t* ent);
UV_EXTERN int uv_fs_stat(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_fstat(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_rename(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    const char* new_path,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_fsync(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_fdatasync(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_ftruncate(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    int64_t offset,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_sendfile(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file out_fd,
    uv_file in_fd,
    int64_t in_offset,
    size_t length,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_access(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    int mode,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_chmod(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    int mode,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_utime(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    double atime,
    double mtime,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_futime(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    double atime,
    double mtime,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_lstat(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_link(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    const char* new_path,
    uv_fs_cb cb);

/*
 * This flag can be used with uv_fs_symlink() on Windows to specify whether
 * path argument points to a directory.
 */
#define UV_FS_SYMLINK_DIR 0x0001

/*
 * This flag can be used with uv_fs_symlink() on Windows to specify whether
 * the symlink is to be created using junction points.
 */
#define UV_FS_SYMLINK_JUNCTION 0x0002

UV_EXTERN int uv_fs_symlink(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    const char* new_path,
    int flags,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_readlink(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_realpath(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_fchmod(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    int mode,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_chown(uv_loop_t* loop,
    uv_fs_t* req,
    const char* path,
    uv_uid_t uid,
    uv_gid_t gid,
    uv_fs_cb cb);
UV_EXTERN int uv_fs_fchown(uv_loop_t* loop,
    uv_fs_t* req,
    uv_file file,
    uv_uid_t uid,
    uv_gid_t gid,
    uv_fs_cb cb);

enum uv_fs_event {
    UV_RENAME = 1,
    UV_CHANGE = 2
};

struct uv_fs_event_s {
    UV_HANDLE_FIELDS
    /* private */
    char* path;
    UV_FS_EVENT_PRIVATE_FIELDS
};

/*
 * uv_fs_stat() based polling file watcher.
 */
struct uv_fs_poll_s {
    UV_HANDLE_FIELDS
    /* Private, don't touch. */
    void* poll_ctx;
};

UV_EXTERN int uv_fs_poll_init(uv_loop_t* loop, uv_fs_poll_t* handle);
UV_EXTERN int uv_fs_poll_start(uv_fs_poll_t* handle,
    uv_fs_poll_cb poll_cb,
    const char* path,
    unsigned int interval);
UV_EXTERN int uv_fs_poll_stop(uv_fs_poll_t* handle);
UV_EXTERN int uv_fs_poll_getpath(uv_fs_poll_t* handle,
    char* buffer,
    size_t* size);

struct uv_signal_s {
    UV_HANDLE_FIELDS
    uv_signal_cb signal_cb;
    int signum;
    UV_SIGNAL_PRIVATE_FIELDS
};

UV_EXTERN int uv_signal_init(uv_loop_t* loop, uv_signal_t* handle);
UV_EXTERN int uv_signal_start(uv_signal_t* handle,
    uv_signal_cb signal_cb,
    int signum);
UV_EXTERN int uv_signal_stop(uv_signal_t* handle);

UV_EXTERN void uv_loadavg(double avg[3]);

/*
 * Flags to be passed to uv_fs_event_start().
 */
enum uv_fs_event_flags {
    /*
   * By default, if the fs event watcher is given a directory name, we will
   * watch for all events in that directory. This flags overrides this behavior
   * and makes fs_event report only changes to the directory entry itself. This
   * flag does not affect individual files watched.
   * This flag is currently not implemented yet on any backend.
   */
    UV_FS_EVENT_WATCH_ENTRY = 1,

    /*
   * By default uv_fs_event will try to use a kernel interface such as inotify
   * or kqueue to detect events. This may not work on remote filesystems such
   * as NFS mounts. This flag makes fs_event fall back to calling stat() on a
   * regular interval.
   * This flag is currently not implemented yet on any backend.
   */
    UV_FS_EVENT_STAT = 2,

    /*
   * By default, event watcher, when watching directory, is not registering
   * (is ignoring) changes in it's subdirectories.
   * This flag will override this behaviour on platforms that support it.
   */
    UV_FS_EVENT_RECURSIVE = 4
};

UV_EXTERN int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle);
UV_EXTERN int uv_fs_event_start(uv_fs_event_t* handle,
    uv_fs_event_cb cb,
    const char* path,
    unsigned int flags);
UV_EXTERN int uv_fs_event_stop(uv_fs_event_t* handle);
UV_EXTERN int uv_fs_event_getpath(uv_fs_event_t* handle,
    char* buffer,
    size_t* size);

UV_EXTERN int uv_ip4_addr(const char* ip, int port, struct sockaddr_in* addr);
UV_EXTERN int uv_ip6_addr(const char* ip, int port, struct sockaddr_in6* addr);

UV_EXTERN int uv_ip4_name(const struct sockaddr_in* src, char* dst, size_t size);
UV_EXTERN int uv_ip6_name(const struct sockaddr_in6* src, char* dst, size_t size);

UV_EXTERN int uv_inet_ntop(int af, const void* src, char* dst, size_t size);
UV_EXTERN int uv_inet_pton(int af, const char* src, void* dst);

UV_EXTERN int uv_exepath(char* buffer, size_t* size);

UV_EXTERN int uv_cwd(char* buffer, size_t* size);

UV_EXTERN int uv_chdir(const char* dir);

UV_EXTERN uint64_t uv_get_free_memory(void);
UV_EXTERN uint64_t uv_get_total_memory(void);

UV_EXTERN uint64_t uv_hrtime(void);

UV_EXTERN void uv_disable_stdio_inheritance(void);

UV_EXTERN int uv_dlopen(const char* filename, uv_lib_t* lib);
UV_EXTERN void uv_dlclose(uv_lib_t* lib);
UV_EXTERN int uv_dlsym(uv_lib_t* lib, const char* name, void** ptr);
UV_EXTERN const char* uv_dlerror(const uv_lib_t* lib);

UV_EXTERN int uv_mutex_init(uv_mutex_t* handle);
UV_EXTERN void uv_mutex_destroy(uv_mutex_t* handle);
UV_EXTERN void uv_mutex_lock(uv_mutex_t* handle);
UV_EXTERN int uv_mutex_trylock(uv_mutex_t* handle);
UV_EXTERN void uv_mutex_unlock(uv_mutex_t* handle);

UV_EXTERN int uv_rwlock_init(uv_rwlock_t* rwlock);
UV_EXTERN void uv_rwlock_destroy(uv_rwlock_t* rwlock);
UV_EXTERN void uv_rwlock_rdlock(uv_rwlock_t* rwlock);
UV_EXTERN int uv_rwlock_tryrdlock(uv_rwlock_t* rwlock);
UV_EXTERN void uv_rwlock_rdunlock(uv_rwlock_t* rwlock);
UV_EXTERN void uv_rwlock_wrlock(uv_rwlock_t* rwlock);
UV_EXTERN int uv_rwlock_trywrlock(uv_rwlock_t* rwlock);
UV_EXTERN void uv_rwlock_wrunlock(uv_rwlock_t* rwlock);

UV_EXTERN int uv_sem_init(uv_sem_t* sem, unsigned int value);
UV_EXTERN void uv_sem_destroy(uv_sem_t* sem);
UV_EXTERN void uv_sem_post(uv_sem_t* sem);
UV_EXTERN void uv_sem_wait(uv_sem_t* sem);
UV_EXTERN int uv_sem_trywait(uv_sem_t* sem);

UV_EXTERN int uv_cond_init(uv_cond_t* cond);
UV_EXTERN void uv_cond_destroy(uv_cond_t* cond);
UV_EXTERN void uv_cond_signal(uv_cond_t* cond);
UV_EXTERN void uv_cond_broadcast(uv_cond_t* cond);

UV_EXTERN int uv_barrier_init(uv_barrier_t* barrier, unsigned int count);
UV_EXTERN void uv_barrier_destroy(uv_barrier_t* barrier);
UV_EXTERN int uv_barrier_wait(uv_barrier_t* barrier);

UV_EXTERN void uv_cond_wait(uv_cond_t* cond, uv_mutex_t* mutex);
UV_EXTERN int uv_cond_timedwait(uv_cond_t* cond,
    uv_mutex_t* mutex,
    uint64_t timeout);

UV_EXTERN void uv_once(uv_once_t* guard, void (*callback)(void));

UV_EXTERN int uv_key_create(uv_key_t* key);
UV_EXTERN void uv_key_delete(uv_key_t* key);
UV_EXTERN void* uv_key_get(uv_key_t* key);
UV_EXTERN void uv_key_set(uv_key_t* key, void* value);

typedef void (*uv_thread_cb)(void* arg);

UV_EXTERN int uv_thread_create(uv_thread_t* tid, uv_thread_cb entry, void* arg);
UV_EXTERN uv_thread_t uv_thread_self(void);
UV_EXTERN int uv_thread_join(uv_thread_t* tid);
UV_EXTERN int uv_thread_equal(const uv_thread_t* t1, const uv_thread_t* t2);

/* The presence of these unions force similar struct layout. */
#define XX(_, name) uv_##name##_t name;
union uv_any_handle {
    UV_HANDLE_TYPE_MAP(XX)
};

union uv_any_req {
    UV_REQ_TYPE_MAP(XX)
};
#undef XX

struct uv_loop_s {
    /* User data - use this for whatever. */
    void* data;
    /* Loop reference counting. */
    unsigned int active_handles;
    void* handle_queue[2];
    void* active_reqs[2];
    /* Internal flag to signal loop stop. */
    unsigned int stop_flag;
    UV_LOOP_PRIVATE_FIELDS
};

/* Don't export the private CPP symbols. */
#undef UV_HANDLE_TYPE_PRIVATE
#undef UV_REQ_TYPE_PRIVATE
#undef UV_REQ_PRIVATE_FIELDS
#undef UV_STREAM_PRIVATE_FIELDS
#undef UV_TCP_PRIVATE_FIELDS
#undef UV_PREPARE_PRIVATE_FIELDS
#undef UV_CHECK_PRIVATE_FIELDS
#undef UV_IDLE_PRIVATE_FIELDS
#undef UV_ASYNC_PRIVATE_FIELDS
#undef UV_TIMER_PRIVATE_FIELDS
#undef UV_GETADDRINFO_PRIVATE_FIELDS
#undef UV_GETNAMEINFO_PRIVATE_FIELDS
#undef UV_FS_REQ_PRIVATE_FIELDS
#undef UV_WORK_PRIVATE_FIELDS
#undef UV_FS_EVENT_PRIVATE_FIELDS
#undef UV_SIGNAL_PRIVATE_FIELDS
#undef UV_LOOP_PRIVATE_FIELDS
#undef UV_LOOP_PRIVATE_PLATFORM_FIELDS

#ifdef __cplusplus
}
#endif
#endif /* UV_H */
